Proportionate feeding device for concrete-mixers.



w. KILMER, s. -PROPORTIONAIE FEEDING DEVICE FOR CONCRETE MIXERS. APPLICATION FILED SEPT- H, I916. v 1,247,40. Patented NOV. 20, 191?.

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W. KILMER, SR. PROPO RTIONATE FEEDING DEVICE FOR CONCRETE MIXERS. APPLICATION man SEPT- I l. I916. IL ,%%?A@@, PatentedNov. 20,191?

2 SHEETSSHEET 2.

[nvc r1250?" WILLIAM PROPORTIONATE Specification of Letters Patent.

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FEEDING DEVICE FOR CONCRE'IE-MIXEBS.

Patented Nov. 2t), 1191?.

Application filed September 11,1916. Serial No. 113,453.

To all whom it may concern. 7

Be it known that I, VVILLIAM KILMER, S12, citizen of the United States, and resident of Brooklyn, in the coimty of Poweshiek and State of Iowa, have invented a certain new and useful Proportionate Feeding Device for ConcreteMiXers, of which the following is a specification.

The object is to provide a proportionate feeding device for a concrete mixer so constructed and arranged that the relative proportion of cement and sand may be varied according to the wish of the operator.

A further object is to provide such a machine in which the cement and sand are fed to a mixing cylinder or chamber in such a way as to facilitate a thorough admixture of the ingredients in the mixing chamber.

Still a further object of my invention is to provide such a machine adapted to allow the ingredients to fall from the bottom of the hopper directly into the mixing chamber whereby a tendency of the parts to become stalled on account of obstruction is lessened.

Still a further object of my invention is to provide a combined closure device and.

agitating deviceconstructed in such a man ner that the amount of each ingredient fed from the hopper may be regulated by adjusting said device.

My invention consists in the construction,

. arrangement and combination of the various tional view through the machine.

Fig. 4: shows a vertical, transverse sec tional View, taken on the line l4: of Fig. 3, and I r Fig. 5 shows aperspective view of one of the sliding memberswhereby the flow of the ingredients is controlled.

In the accompanying drawings 1 have used the reference numeral 10 to indicate generally the frame of my concrete mixing machine, which is. mounted upon suitable supporting wheels 11. A tongue 12 may, 1f

desired, be connected with the frame for the der.

purpose of drawing the machine from place to place.

Suitably mounted on the frame, prefer ably near one end thereof, is a transverse shaft 13, which as shown in the drawings is located near the front of the machine. On one end of the shaft 13 is a suitable means such as the pulley wheel let, for connecting the shaft 13 with the source of Mounted on the frame preferably rearwardly ofthe shaft 13, is a mixing cylinder power from the shaft 13 to theshaft 17.

On the shaft 17 is a screw 24-, and on the blade of the screw is a plurality of flanges 25 which. facilitate thorough mixing of the contents of the receptacle 15. On the shaft 17 near each end of the receptacle 15 1s a bell-shaped shield to protect the bearings of the shaft 17 from the sand and cement.

lvlounted above the rear end of the receptacle 15 is a water tank 27 having at its lower forward portion a discharge cook 28 adapted to discharge into the mixing cylinder orreceptacle at a point spaced from the rear end thereof.

Above the forward portion of the mixing receptacle is a hopper 29 supported by members 30 on the frame 10. In the hopper 29 is a transverse partition 31. mounted on the frame below the hopper 29 are bars on opposite sides of the receptacle 15, which bars are connected at their forward ends by a member 33. A bar 34: eX- tends forwardly in the machine from the member 33 between guide rollers 35.- The bars travel between the rollers 36 mounted on the upright supporting members 30.

Mounted between thebars 32 and the frame 10 are transverse adjustable closure devices, each comprising an upper flat bar 37, having a plurality of spaced upwardly extending pins or the like 38. Below each bar 37 is a pair of parallel horizontal bars 39.

Slidably Below each pair of bars 39 is a transverse bar 4L0. The bars 40 and, 37 are secured to I the bars 32 by means of bolts ll on which are nuts 42. screwing the nuts 42 tightly 5 on the bolts 41 the bars 39 are'gripped bebe varied so that the relative proportions of such ingredients in the completed mixture may be regulated' 'asdesired.

tween the.bars 410. and the bars 37...;J3y,

moaning such 'nuts 'the bars 39 maybe spread apart or moved-together for varyingthe total width of the closure devices. The d-bottom of the hopper 29 iscontracted somewhat, as shown in Fig. 3, and is open.-. The

' closure devices are so arranged with relation i to eachother that they stand below the re- 'spe'ctive compartments formed on each slde *of-the partition 31.

"* Pivoted to the bar 34: is a pitman 43 which f extends forwardly. and downwardly and is 1 operatively connectedat its forward end to a crank 4 1,011 the shaft 13. The lower rear gd-walloffthe hopper 29 is hinged at 15 and the lower end of the partition 31 is hinged "at 4:6 Pivoted to the lower hinged member "4650f the partition 31 is a rod 17 extending 1 above the line of the hinges 46, downwardly f and forwardly, is a partition 52 lying spaced beneath it for the operation of the" hinged member 46*.

- 35' In the practical operation of my improved *gc'oncrete mixing machine, the machine is set in "operation by means of any suitable source o'f power; It will be seen that the screw 24 will be rotated through the mechanism here- 40 inbefore described, and that the bars 32 will be reciprocated carrying with them the. clo- 46 and 49 and'thespring device for holding thein in proper position. On account ofthe construction here1n described, of said hinged will thus} Attention ,iscalled ,to the hinged members members; if ai rock or "large pebble should be fed downwardly it can pass between the 1 pins 38 and the membei'efi qor themember gas themes may ibe, without injury to eim n y- 51 be fseen that with'llo'ny lilmprpved concrete mixer concreteimayilbe llllXGd' W113l1 =t11ydesirable relative properof cement-'and-sand, and that the entire mix ng process performed "by the "ma- "chineryn "The amount-L of water supplied to My-de'vice ismagi? "Os- 5311561515 0that it maybe readily-portable. It willbe seen 'from the foregoing description that the l'Ilit- I chinery of my mixer is comparatively simple andthatthe entire machine may be made at a comparatively small expense, so thatthe machine may be'used on small-jobs. rLnengine or other suitable source of -power may, 1f desired,be mounted upon theframe10; It will be understood-that somejchanges may beQinade inthearrangement and con- ,struct1on'of the parts of-my concrete mixer,

v without departing from the essential feasure devicesabove described The .concrete' and sand are simultaneously poured into the "compartments of the hopper. The cock 28 45' maybe turned for allowingany desired flow ofwater from the tank 27. The cement'and sand will flow downwardly past the closure devices as the closure devices are'recipro- 4 cated; On account of the fact that when the 501jclosuredevicesareat any except their-central positions, that part of the lower ends of the compartments of the hopper will be open. The closure devices may be reciprocatedwithsuch rapidity'that the sand and 55 cement is fed downwardly and is then 7 thrown rearwardly and forwardly by the "closure devices so as to scatter suchingreclients and thus facilitate theirthorough admixture. The mixing is completed by'means 60 ,of the screw'24 and flanges 25, so'that by the ,tiniethe mixture reaches the discharge tube f l frame adjacent to -eachother and having'disl charge openings"in thebottoin thereof, a

. 16 the mixing is completed.

5 jBy" varying the positions of the 39 and of thetwo-closure devices, the relative a aerate of feed of the sand and concrete may "is my intention to covenby my" present apiili dn-ai klevice off theclass described, a

"the first framebeiieath the-discharge openingof each hopper'when the frame is in anintermediate position-re1ative to the limtures and purposes; of-fmy invention, and plication any such; changedforms of con struction when may be included withinthe reasonablescope of my claimsa I .1 claim as my invention:

p v frame,;apair of hoppers mounted on said frame adjacent tofleach other and havin discharge openings'in the bottom thereof, 7

asecond frame 'adapted to' 'reciprocate on ings of said hoppers, apaii'of spacedtraiis verse bars fixed tog-said second theme;- and adapted .to rest beneatli the 3 discharge open l itsofitsreciprocation, a pair of spaced bars adapted, to "bei received between the parts of the first described'pair of bars and toextend therefrom toward the ends of cathe --second' described frame, and ineans for securing said last described bars in any .desired position relativesto the distance which they extend from aidfirstidescribed pairs ofbars; "2. Ina device or "the class" (ital-ate, a

l frame, a pair of hoppers mounted on'said second frame adapted to reciprocate on the V 1 first frame beneath the "discharge openings j of said hoppers, a pair of spaced transverse bars fixed to said second frame and adapted to rest beneath the discharge opening of each hopper when the frame is in an intermediate position relative to the limits of its reciprocation, a pair of spaced bars adapted .to be received between the parts of the first described pair of bars and to extend therefrom toward the ends of the second described frame, and agitating members fixed to the upper bar of each of said first described pairs of bars and extended upwardly therefrom.

3. In a device of the class described, a hopper having an elongated discharge opening near the bottom thereof, a frame member adapted to reciprocate beneath said discharge opening, the direction of the motion of said frame being perpendicular to a line through the long way of said discharge opening, a pair of spaced transverse bars fixed to said frame, a second pair of bars secured between the first pair of bars and adapted to have one side edge extend beyond the opposite side edges of the first described bars, means for varying the distance, which the edges of said second pair of bars extend beyond the edges of said first pair of bars, and means for reciprocating said frame.

Brooklyn, Iowa, Sept. 1st, 1916.

WILLIAIVI KILMER, SR. Vitnesses W. WV. SHURMON, W. O. CARTER.

Copies of this patent ma; be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

